(Project No.) 606-1a 11/02/04

shawlaskewvilleUrban and Civil

Nov 29, 2013 (3 years and 11 months ago)

104 views


(Project
No.)


606
-
1
a

11/02/04

Amend
Section 606
-

Guardrail

to read as follows:

1


2


SECTION 606
-

GUARDRAIL

3


4

606.01

Description.

This
section describes furnishing and
installing
5

guardrails
includ
i
ng
assembly and erection of component parts, designated as
6

follows:

7


8


(1)


Type 1 (Unassigned)

9


10

(2)


Type 2
(Unassigned)

11


12

(3)


Type 3 Beam Type Guardrail

13


14

(4)


Type 4 Rigid Barrier Type Guardrail

15


16

606.02

Materials.


17


18

Joint Fillers

705.01

19


20

Reinforcing Ste
el

709.01

21


22

Wire Rope or Wire Cable

709.02

23


24

Chain Link Fencing

710.03

25


26

Metal Beam Rail

710.04

27


28

Guardrail Posts

710.07

29


30

Guardrail Hardware

710.08

31


32


Concrete for Type 4 Rigid Barrier Type Guardrail shall
conform to Section
33

601
-

Structural Concrete.

34


35


Steel
post
s

and
steel rail beam
s

for the Type 3 Beam Type Guard Rail

36

shall be zinc
-
coated
.
Damaged zinc
-
coated base metal surfaces shall be
37

repaired
ac
cording to Subsection 501.03(G)(2)


Repairing
Damaged Zinc
-
38

Coated Surfaces.

39


40

606.03

Construction Requirements.

Assemble and erect guardrails.

41


42


Preserve and protect existing facilities
to remain.

Replace
guardrails
43

damaged by
the Contract
or
.

At the end of each work day, protect any opening
44

in the guardrail system no yet completed with acceptable physical barriers.

45


46


(Project
No.)


606
-
2
a

11/02/04

(A)


Beam Type Guard Rail.

Repair zinc
-
coated base metal surfac
es
47

damaged during installation and assembly, in accordance with
48

Subsection 501.03(G)(2)


Repairing
Zinc
-
Coated Surfaces.

49


50

(1)

Posts.
When using a suitable method, the Contractor
51

may drive only steel posts, except those with anchors, into the
52

grou
nd. Maintain an accurate vertical alignment and shall not
53

deform the steel post.

54


55


Set the wood and steel posts with anchors plumb in hand or
56

mechanically dug holes. Backfill post holes with acceptable
57

material placed in layers and compact thoroughly.

58


59


Set the posts vertically in the ground to the approximate
60

depth shown in the contract. The posts, after backfilling or
61

driving, shall be in accurate alignment with their tops at the
62

required grade.

63


64


The Contractor may vary the guardrail post locat
ions shown
65

in the contract to ease clearing utility lines or to produce smooth
66

transitions. Request such variance for acceptance by the
67

Engineer. The Contractor may not vary the guardrail post locations
68

of terminal sections.

69


70


When the contract require
s additional bolts and holes on
71

posts, drill the additional bolt holes and furnish the bolts for proper
72

installation. Drill, furnish, and install
these
additional bolts at no
73

cost to the State.

74


75


Do not make the additional bolt holes in posts b
y burning
76

with a torch or other method or device. Manufacture or drill the
77

holes in the posts.

78


79


Apply a preservation treatment to the wood posts and blocks
80

according to Section 714
-

Structural Timber and Related Materials.

81


82


Where field cutting or bo
ring is done after treatment,
83

thoroughly swab, spray, or brush the cuts and holes with two
84

applications of preservatives accepted by the Engineer.

85


86

(2)

Rail Elements.

Install the rail elements that results in a
87

smooth, continuous installation.
Draw the bolts, except
88

adjustment bolt, tight. Bolts shall be of sufficient length to
89

extend beyond the nuts.

90


91


(Project
No.)


606
-
3
a

11/02/04


When the contract requires setting the guardrail posts at
92

non
-
standard spacing, cut the rail elements and drill bolt holes as
93

necessary f
or proper installation.

94


95


Do not make the additional bolt holes by burning with a torch
96

or other method or device.

97


98


The Contract does not require paint on zinc
-
coated steel
99

railing.

100


101

(3)

Existing Guardrail.

The Contractor shall be responsible
102

for veri
fying underground facilities such as utilities ducts, cables,
103

and pipes in locations where the Contractor will drive guardrail
104

posts. Repair damages done to the facilities despite the location or
105

if shown in the contract at no cost to the State.

106


107


When
removing the existing guardrails, backfill and
108

compact the holes with suitable material. Grade and compact the
109

shoulder area before installing the new guardrails and posts.

110


111


Reinstallation of guardrail shall be according to Subsection
112

606.03(A).

113


114


Wh
en replacing the existing guardrails with new guardrails
115

and posts, do not leave an unprotected opening in the guardrail
116

system of more than 500 linear feet. Also, after each work day,
117

protect the areas not yet completed with physical barriers
118

acco
rding to the latest MUTCD.

119


120

(4)

Reset Guardrail Post.

Adjust the height of existing
121

guardrail post such that the guardrail element will be at the required
122

height according to the contract.

123


124


Spacer blocks bolted to the existing post are to remain
125

intac
t. When required or specified by the Engineer, excavate or fill
126

and compact around the post to be adjusted. Replace the
127

guardrails that are damaged by the Contractor due to its operation
128

at no cost to the State and according to the contract.

129


130

(B)


Ca
ble
-
Chain Link Barrier Guardrail.

131


132

(1)

Post.

Place the post at equal intervals. The Contractor
133

may space the end post closer to adjacent posts, if specified by
134

the Engineer. Set the posts vertical. Crown the concrete
135

portion of the post f
ooting at the top to shed water.

136


137


(Project
No.)


606
-
4
a

11/02/04

(2)

Chain Link and Tension Cable or Top Rail.

Fasten the
138

chain link fabric to the tension cable, top tension wires or top rail,
139

and posts with tie wires. Space the tie wires at approximately:

140


141

(a)

24 inch interva
ls to the tension cable, top tension
142

wires or top rail and

143


144

(b)

15 inch intervals to the posts.

145


146


The tie wires shall start two inches from the top of the fabric
147

with tie wires. Give the tie wire at least one complete twist.

148


149


Install the chain link f
abric on the outer portion of the cables
150

after clamping the cables in place and torque the u
-
bolts properly.
151

The chain link fabric shall be on the "U" side of the cable clamps.

152


153


Stretch the tension wire tight with the turnbuckles. Install
154

the turnbuc
kles at the beginning and end of each continuous
155

section of chain link fabric and at such intermediate points as may
156

be necessary for tightness.

157


158


Provide turnbuckles between 500 feet and 600 feet intervals
159

for each tension cable.

160


161


Stagger the turnbuckle
connections for tension cables so
162

that the Contractor may locate not more than one turnbuckle in one
163

panel. When a turnbuckle assembly falls at or within six inches of
164

a post, clamp only the cable on the side of the post opposite the
165

turnbuckle assembly
to the post. At these locations, fasten the
166

turnbuckle assembly or the cable on the turnbuckle side to the post
167

with a No. 9 gage tie wire.

168


169


When connecting tension cables to pipe
-
type turnbuckles by
170

factory swaged steel pulls, the complete turnbuck
le assembly shall
171

develop 100% of the breaking strength of the cable.

172


173


Furnish one test sample of cable to the Engineer for each
174

10,000 feet or less of cable the Contractor will install. The test
175

sample shall be three feet in total length. Fit the

test sample
176

properly with right
-
hand thread swaged pulls at both ends as
177

specified in the above paragraph.

178


179


When connecting the tension cables to drop forged steel
180

closed sockets, the complete turnbuckle assembly shall develop
181

100% of the breaking stren
gth of the cable. Fill the sockets with
182

pure zinc.

183


184


(Project
No.)


606
-
5
a

11/02/04


Furnish one test sample of cable to the Engineer for each
185

10,000 feet or less of cable the Contractor will install. The test
186

sample shall be three feet in total length. Fit the test sample
187

pr
operly socketed at both ends as specified in the above
188

paragraph.

189


190


The Contractor may use preformed zinc
-
coated cable dead
191

ends as an alternative method of connecting the tension cables to
192

the turnbuckles at anchor blocks only. The installed dead ends

193

shall develop 100% of the breaking strength of the cable.

194


195


At structures where constructing two barrier fences, bound
196

or weld the exposed ends of the connecting tension cables.

197


198


Do not overtighten the tension cables. Position the
199

tension cables fir
mly so that between
0.25

inch and
0.5

inch sag in
200

the cables between posts occurs.

201


202


Place the u
-
bolts of the cable clamp assemblies across the
203

lay of the tension cables. Tighten the nuts on the u
-
bolts by
204

applying between 30 and 35 foot
-
pounds of torq
ue.

205


206


When installing barrier on existing structures, anchor the
207

posts to the deck shown in the contract.

208


209


Drill anchor bolt holes in the deck without spalling or
210

damaging the concrete surrounding the hole. Set the anchor
211

bolts with a mixture of comm
ercial quality, modified epoxy
212

adhesive and sand. The proportions of modified epoxy shall be
213

between one adhesive to four sand and one adhesive to six sand.
214

The Engineer will establish the exact proportions. The
215

cementing agent includes two compo
nent mixture of modified
216

epoxy adhesive manufactured especially for the making of
217

epoxy
-
sand grouts. Mix two components according to the
218

manufacturer's directions for use.

219


220


(C)


Rigid Barrier Type Guardrail.

221


222

(1)

Preparation.

Shape and compact t
he foundation to a firm
223

even surface according to the contract. Remove and replace soft
224

and yielding material with acceptable material according to Section
225

305
-

Aggregate Subbase Course.

226


227

(2)

Forms.

Forms shall be according to Section 503
-

228

Concre
te Structures.

229


230


(Project
No.)


606
-
6
a

11/02/04

(3)

Placing Concrete.

Moisten the foundation thoroughly
231

immediately before placing the concrete. Concrete shall be
232

cast
-
in
-
place. Place the concrete according to Section 503
-

233

Concrete Structures.

234


235


On new and existing concrete
bridge deck, dowel the barrier
236

into the deck shown in the contract.

237


238

(4)

Finishing.

Finish the surface to a smooth, even surface
239

according to Subsection 503.03(M)(2)
-

Class 2 Rubbed Finish.

240


241

(5)

Joints.

Construct expansion joint shown in the con
tract or
242

at existing expansion joints of structures. Expansion joint filler
243

shall be
0.5

inch thick.

244


245


Provide the construction joints with keys and at intervals
246

shown in the contract.

247


248

(6)

Transition Sections.

At the end of the barrier, adjust or

249

construct new and/or existing guardrail or chain link fence as
250

specified by the Engineer or shown in the contract.

251


252

606.04

Method of Measurement.

The pay items listed below
will be paid
253

on a lump sum basis. Measurement for payment does not apply.

254


255


256

606.05

Basis of Payment.

The Engineer will pay for the accepted pay
257

items listed below on a lump sum basis
. Payment will be full compensation for
258

the work prescribed in this section and the contract documents.

259


260


The Engineer will
pay
for each of
the following pay item when included in
261

the proposal schedule.

262


263


Pay Item

Pay Unit

264


265

Guardrail Type _____

Lump Sum

266


267

End Anchorage Type _____

Lump Sum

268


269

Terminal Section Type _____

Lump Sum

270


271

Transition Section Type _____

Lump Sum

272


273

Reset Guardrail Post

Lump Sum


274


275

END OF SECTION

606

276